<?xml version="1.0" encoding="UTF-8"?>
<element name="foo" xmlns:rng="http://relaxng.org/ns/structure/1.0" xmlns:ann="http://whatever.any/thing" xmlns="http://relaxng.org/ns/structure/1.0">
  <ann:embed>
    <rng:element name="bar">
      <rng:empty/>
    </rng:element>
  </ann:embed>
  <!-- [ rng:foo [ rng:empty [ ]] -->
  <text/>
</element>
